benchmarks
One method: invented vendors graded from their own request logs. Integration Bench is live; Legacy Integration Bench is in authoring.
Legacy Integration Bench
Every benchmark on this site is built the same way. A vendor is declared once and generated into a live API simulator plus the documentation an agent reads, with a budget of deliberate documentation errors. The agent receives a ticket, a starter repository and that documentation, and has to make the integration work against the live simulator.
Grading never reads the code. It checks the data that ended up in the store against a committed answer key, reads protocol discipline out of the vendor's own request log, and checks whether the integration survived the faults injected mid-run. A failed mandatory check zeroes the task. Every check is a programmatic assertion over a recorded run, so the score can be recomputed offline by anyone.
Public tasks are for development and are what these leaderboards report. Held-out tasks are the exam; nothing about them is published until a sweep is complete.